Quick answers
- Which hospitals does Walter F. Klein work at?
- Medicare's official clinician data lists Walter F. Klein at 2 hospitals: Loma Linda University Medical Center and Riverside University Health System-Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Walter F. Klein see patients?
- Medicare's clinician data lists 1 practice location in Moreno Valley, CA. Call before your visit to confirm the address.
- What is Walter F. Klein's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Internal Medicine.
- Does Walter F. Klein accept Medicare assignment?
- Yes. Medicare's clinician data says Walter F. Klein accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Walter F. Klein?
- (951) 656-1500, as listed in official Medicare / NPI Registry data.
- What is Walter F. Klein's NPI number?
- 1366645491. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Walter F. Klein works
Medicare's Facility Affiliation Data lists Walter F. Klein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · CCN 050327
- Riverside University Health System-Medical CenterMoreno Valley, CA · Acute Care Hospital · CCN 050292
Practice locations
Addresses where Walter F. Klein is enrolled with Medicare (CMS data updated 2026-10-02).
- 26520 Cactus AveMoreno Valley, CA 92555 (951) 656‑1500
Group practices
Medicare enrollment lists Walter F. Klein as a member of this group (CMS data updated 2026-10-02).
- Riverside Faculty Medical Group Inc80 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Internal Medicinealso
Other pulmonologists in Moreno Valley
Clinicians with the same Medicare primary specialty in Moreno Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366645491 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians